Which statement best illustrates an example of economic specialization? a. employee leaves a large corporation to start her own business
b. an artist becomes an expert at designing a website for restaurants
c. a business owner only hires employees with a wide variety of skills
d. a country decides to stop importing goods from foreign companies

Firms use marginal analysis to determine prices by a) changing prices in accordance with information from retailers. b) using comparisons with strong competitors to position prices accordingly. c) examining the effect on revenue of small changes to the price of one item. d) trying to minimize production costs by using better and more efficient methods.